River ducks are a type of waterfowl that inhabit rivers and other bodies of water. The term river duck can refer to several species, including the TEAL, smee, pintail, EIDER, SMEW, and bluewingedteal. The TEAL is a small dabbling duck with a short neck and a rounded head. The smee is a medium-sized diving duck with a long neck and a pointed bill. The pintail is a large dabbling duck with a long neck and a pointed tail. The EIDER is a large sea duck with a thick neck and a large bill. The SMEW is a small diving duck with a short neck and a pointed bill. The bluewingedteal is a small dabbling duck with a short neck and a blue patch on its wings.